Near-Term Mars Colonization - DevelopSpace Project - April 20, 2008

Overview Project recap Some project “mechanics” Discussion of areas of work / assignment to team members Overview of some initial analysis

Project Motivation For manifold reasons, it is our destiny as humans to expand our presence: –Since the existence of our species, we have expanded our habitat over almost the entire Earth –This expansion was enabled by using technology (e.g. living in central Europe or northern Minnesota and surviving the winter) The next logical step is to go beyond Earth –Requires more significant reliance on technology In addition to expanding our presence, there may be numerous other benefits from this: –Rekindling of frontier spirit, societal invigoration –Generation of new technologies, now knowledge –Backup of our species and its achievements There are people who want to make it happen

Project Goals To determine what would be involved in implementing a sustained human presence on Mars in the near future –By way of one-way colonization –For minimum closure and maximum closure levels –For constant or growing population size To investigate the cost of providing the colony with the capability for emergency evacuation back to Earth To gain an understanding of the financial needs and the time phasing of a near-term Mars colonization program To further develop the DevelopSpace infrastructure through identification of infrastructure needs

How to Colonize Mars Here are some initial ideas for our project: –Humans will be sent one way, possibly with an initial emergency Earth return capability Return capability could be based on direct return –Re-supply will initially be provided from Earth, possible augmented with ISRU on Mars Initially atmosphere-based ISRU Possibly also greenhouses for growing food –The population of the colony will be assumed to grow over time Maybe 4 crew initially, minimum of 2 additional every opportunity

Project Mechanics We now have a project website: – Action items: –Create project mailing list (Paul?) –Update your contact details / add yourself to the team –Project members need to identify task(s) they want to work on and put together an action plan for the task(s) –Review NASA Mars DRM 1.0, 3.0, Exploration Blueprint Data Book, and Mars Direct (see key references) Project timeline: –What about a review in early September 2008?

Possible Areas of Work for Project Surface power: solar vs. nuclear + different secondary power generation and energy storage technologies Surface infrastructure other than power: habitation, surface mobility / transportation / EVA, surface operations Logistics, life support, and ISRU: life support system closure, ISRU, re-supply from Earth Earth-Mars transportation, Mars EDL Return to Earth in emergency CAD modeling / visualization of concepts Location, location, location! Where should the colony be located? Financial and management considerations: financing of project, operational management, program planning Integration of results into coherent strategy Other… (information system) Chase Ryan Paul (advising) Wilfried Arthur, Ryan Arthur, Chase All

Preliminary Surface Power System Assessment - Volume and Mass Specific Power - Nuclear thermo-ionic (NASA Mars DRM 1.0) Nuclear + Stirling (JSC element database) ASRG-EUGPHS-RTG TF Solar +RFC+ASRG -EU 25% Rigid solar +LiIon +ASRG-EU 25% Rigid solar +LiIon TF solar +RFC TF Solar + ASRG-EU 25% + Li-Ion TF solar + Li-Ion batteries Equal power (same during day and night) TF Solar + Li-Ion Equal energy Note: nuclear fission power source estimates vary widely depending on TC method, shielding concept, etc. Solar + battery technology trend

Baseline Surface Mobility Capabilities Unpressurized –2 independent unpressurized rovers on traverse, each can carry the entire crew back to base in contingency –Exploration radius is limited by contingency constraints and EVA time –Due to 2 independent vehicles on traverse drive-back constraint applies –This is different from the walk-back constraint for Apollo traverses which had only a single vehicle – the LRV –20 – 25 km ideal exploration radius from base can be achieved for 6 – 8 hour excursion Pressurized –2 independent pressurized vehicles on traverse, each can carry the entire crew back to base in contingency –Either the camper concept or a pressurized rover can be used (we think there are advantages to the camper concept) –Exploration radius is limited by consumables and energy storage mass rather than contingency constraints –For the analysis presented here we assumed 2 pressurized rovers with a total mass of 5700 kg (nominal 2 crew) Crew compartment (2000 kg) Chassis with drive train (1000 kg) Batteries and supplies (up to 2300 kg) - Average non-driving power per rover: 1500 W - Consumables 2 crew: 40 kg / d - Mass of crew with suits: 400 kg - Science payload per rover: 200 kg Proposed Apollo 15, 16, 17

Baseline Surface Exploration Capabilities Energy density: 150 Wh / kg Energy density: 350 Wh / kg

Extension of Pressurized Mobility Radius “Mars gas station” –Self-propelled chassis with energy storage and solar power generation is pre-positioned –Crew visits station with pressurized rovers and swaps energy storage (“pit stop”) –Can theoretically be extended indefinitely Exploration traverse (meandering shown) Outpost location Maximum exploration radius Rover Trailer (self- propelled) Outpost location Energy storage swap (“pit stop”) Maximum exploration radius Exploration traverse (meandering shown) Self-propelled trailer –5700 kg trailer, 1000 kg chassis + drive train and 4700 kg energy storage mass –Trailer is self-propelled Analysis shows parasitic drag results in higher mass than propelled trailer –Trailer is delivered to base as with logistics excess capability

Extended Surface Exploration Capabilities (1)

Extended Surface Exploration Capabilities (2)

Extended Surface Exploration Capabilities (3)

Backup Slides

Why Mars? Why would we want to expand to Mars, instead of other destinations such as the Moon? Of all the bodies of the inner solar system eligible for near-term colonization, Mars is the most suitable –Mars has an atmosphere, specifically a CO 2 atmosphere (GCR / SPR protection, feedstock for ISRU) –All the other elements necessary for sustained human existence are present in one for or another on the Martian surface Nitrogen, hydrogen, oxygen, carbon, iron, aluminum, etc. – From a mass / energy perspective, the Martian surface is about as hard to reach as the lunar surface –Higher gravity level than on the Moon Major challenges of Mars are that it takes longer to get there and aeroentry / aerocpature is required

Actions Everyone –Select the areas that you would like to work on, and formulate an initial set of tasks for yourselves –Think about tools we need for this project on DevelopSpace –Start the work! Wilfried –Set up project site on DevelopSpace –Prepare kick-off next weekend